John Sundell 812811ff69
Don’t highlight keyword names used in optional binding (#96)
This patch makes Splash no longer highlight variables with the same
name as a keyword when used in optional binding, for example:

```
if let override = makeOverride() { ... }
```
2020-01-29 11:04:14 +01:00
..
2019-03-11 14:52:46 +01:00